| 词条 | Thortveitite |
| 释义 |
| name = Thortveitite | boxwidth = | boxbgcolor = | image = Thortveitite-ea14a.jpg | imagesize = | alt = | caption = Thortveitite | category = | formula = (Sc,Y)2Si2O7 | molweight = | strunz = 9.BC.05 | dana = | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = C2/m | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 5-6 | luster = vitreous | streak = gray | diaphaneity = | gravity = 3.3-3.8 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} Thortveitite is a mineral consisting of scandium yttrium silicate (Sc,Y)2Si2O7. It is the primary source of scandium. Occurrence is in granitic pegmatites. It was named after Olaus Thortveit, a Norwegian engineer. It is grayish-green, black or gray in color. A transparent gem quality example was found in 2004, and reported in "The Journal of Gemmology", 2008 Volume 31. See also
References{{Refbegin}}
4 : Scandium minerals|Yttrium minerals|Sorosilicates|Monoclinic minerals |
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